package com.atguigu.eduservice.service.impl;

import com.atguigu.eduservice.client.VodClient;
import com.atguigu.eduservice.entity.EduVideo;
import com.atguigu.eduservice.mapper.EduVideoMapper;
import com.atguigu.eduservice.service.EduVideoService;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.ArrayList;
import java.util.List;

/**
 * <p>
 * 课程视频 服务实现类
 * </p>
 *
 * @author testjava
 * @since 2020-04-18
 */
@Service
public class EduVideoServiceImpl extends ServiceImpl<EduVideoMapper, EduVideo> implements EduVideoService {

    @Autowired
    private VodClient vodClient;

    //TODO 删除小节，删除对应视频文件
//1 根据课程id删除小节
@Override
public void removeVideoByCourseId(String courseId) {
    //1 根据课程id查询课程所有的视频id
    QueryWrapper<EduVideo> wrapperVideo = new QueryWrapper<>();
    wrapperVideo.eq("course_id",courseId);
    wrapperVideo.select("video_source_id");
    List<EduVideo> eduVideoList = baseMapper.selectList(wrapperVideo);

    // List<EduVideo>变成List<String>
    List<String> videoIds = new ArrayList<>();
    for (int i = 0; i < eduVideoList.size(); i++) {
        EduVideo eduVideo = eduVideoList.get(i);
        String videoSourceId = eduVideo.getVideoSourceId();
        if(!StringUtils.isEmpty(videoSourceId)) {
            //放到videoIds集合里面
            videoIds.add(videoSourceId);
        }
    }

    //根据多个视频id删除多个视频
    if(videoIds.size()>0) {
        vodClient.deleteBatch(videoIds);
    }

    QueryWrapper<EduVideo> wrapper = new QueryWrapper<>();
    wrapper.eq("course_id",courseId);
    baseMapper.delete(wrapper);
}
}
